My head is fortunately middle size. Most headphones fits me. 1. Probable no. 2. Probable closer to lcd4. 3. Probable less than lcd4 and 4z. Seriously, it´s a planar magnetic driver without distortion. You can eq`d the bass maybe up to 4-6 db no problem. I think after the first impressions of alexzogh nobody has to worry about the bass quality of lcd24. It´s a audeze headphone. Bass is one of their trademarks.